You are using generational players as the norm when they are outliers and ignoring the fact that damn near half the decent players in the league trained with Hakeem and saw no tangible benefits to their game.
Robin Lopez, Ayton, Drummond, JaVale, Rudy Gay, Blake Griffin, etc
They literally all did it because it was the cool thing to do. Maybe Kobe and Bron benefited but that’s because they are GOAT level players. It stands to reason that they would have improved their post game on their own if they really focused on it. A week with Hakeem isn’t going to do jack shyt for 98% of the league